Nexcess Turpentine: Applying VCL on Configuration Save

Question

The Nexcess Turpentine extension for Magento offers a number of features for implementing a varnish configuration on your Magento system. One of those features is the ability to, automatically, apply a new VCL configuration file to a running varnish instance when the System -> Configuration values change.

Question: When the Nexcess_Turpentine extension does this -- does it save the generated VCL out to disk anywhere?

I know you can save the varnish configuration on the Cache Management page -- I'm specifically interested if the automatic config application also saves out the file.

Answer 1

The VCL is saved to the path given by the turpentine_varnish/servers/config_file configuration option, which defaults to {{root_dir}}/var/default.vcl.

See Nexcessnet_Turpentine_Model_Varnish_Configurator_Abstract::save(), which is called by Nexcessnet_Turpentine_Varnish_ManagementController::saveConfigAction().

Answer 2

My turpentine generates it to

/var/www/WEBROOT/public_html/var/default.vcl

To which I:

ln -s /var/www/WEBROOT/public_html/var/default.vcl /etc/varnish/default.vcl

You can change save file location under

System -> Configuration -> Varnish Options -> Servers -> Config File Location under Default Scope

Auto Apply will write the config file and send the config over the VCL admin and reload the server (a restart of course dumps the contents of Varnish, where as a reload just reloads the config (from either sent or file depends on arguments) whilst preserving cache contents)